Loader



J. s. PILCH LOADER 5 Sheets-Sheet 1 Filed Sept. e, 1952 m. w mi MH M Q fN mul. m l\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ s. M M \M/Z CL E- m o JJ. S. PILCH July 24, 1956 LOADER 5 Sheets-Sheet 2 Filed Sept. 6, 1952INVENTOR. JOH N PILCH ATTO NES( July 24, 1956 J. s. PILCH 2,755,572

LOADER Filed sept. e, 1952 s Samus-sheet s INVENTOR. JOHN S. 'PILC HATTE/s/Ew J. S. PILCH July 24, 1956 LOADER 5 Sheets-Sheet 4 Filed Sept.6, 1952 INVENTOR. JOHN S `PILCl- BY ATTOP EK July 24, 1956 J. s. PILCH2,755,572

LOADER Filed Sept. 6, 1952 5 Sheets-Sheet 5 INVENTOR.

ATTOPNEY LOADER .lohn S. Pilch, Ware, Mass.

Application September 6, 1952, Serial No. 308,179

7 Claims. (Cl. 37-117.5)

This invention relates to tractor mounted apparatus and has particularreference to a new and improved tractor mounted loader and bulldozerwhich is relatively simple and economical in construction, yet morerugged than prior constructions and which may easily and quickly beconverted for use either as a loader or dozer as desired.

An object of the present invention is to provide a new and improvedtractor mounted combined dozer and loader which is relatively simple andinexpensive in construction and elicient in operation.

Ano-ther object is to provide a tractor mounted combined dozer andloader apparatus comprising relatively few parts and which may easilyand quickly be converted from a dozer to a loader and vice versa.

Another object is to provide a new and improved tractor mounted combineddozer and loader utilizing elements common to both.

Another object is to provide a new and improved supporting arrangementfor tractor mounted apparatus which is relatively simple and lessexpensive in construction, yet more rugged than prior type supports.

Another object is to provide a support of the type set forth which isformed and attached without the necessity of welding and, therefore,providing a simplified, less expensive construction to manufacture andassemble.

Another object is to provide a new and improved tractor mounted loaderapparatus.

Another object is to provide a new and improved tractor mounted dozerapparatus.

Another object is to provide a new and improved push arm constructionfor tractor mounted apparatus and the like.

Another object is to provide a new and improved apparatus of the typeset forth which may be converted from a dozer to a loader or vice versawithout discon. nection of the push arm actuating cylinders.

Other objects and advantages of the invention will be apparent from thefollowing description taken in connection with the accompanyingdrawings. lt will be understood that changes may be made in the detailsof construction and arrangement of parts, as the preferred forms of theinvention have been given by way of illustration only.

Referring to the drawings:

Fig. l is a side view of an apparatus embodying the invention adaptedfor use as a loader;

Fig. 2 is a side view generally similar to Fig. 1, but showing theapparatus adapted for use as a dozer;

Fig. 3 is a top or plan view of the apparatus shown in Fig. l;

Fig. 4 is a front view of the apparatus shown in Figs. l and 3;

Fig. 5 is a sectional view taken on line 5-5 of Fig. l, looking in thedirection of the arrows;

Fig. 6 is a sectional view generally similar to Fig. 5, but showing amodified form of the invention; and

nited States Patent Fig. 7 is a side view of another form of theapparatus of the invention.

Referring more particularly to the drawings wherein similar referencecharacters designate corresponding parts throughout, the apparatus shownin the drawings is adapted for use on a tractor having the engine 10,frame 11, tracks 12 and operators seat 13.

The tractor is provided with the engine guard 14 which is retained inaligned position with the radiator of the tractor by the supports 15lwhich are secured to the frame 11 on opposite sides of the engine 10,and the supporting members 15' are integral or unitary as shown in Fig.3, and have the central portion thereof formed to extend around the endof the tractor engine and have the guard 14 secured thereon.

Both the loader arrangement of Fig. l and the dozer arrangement of Fig.2 are supported on the tractor by means of the substantially triangularupright supports 18, one of which is provided on each side of thetractor and which is secured by the clamp 19 to the dead axle of thetractor to thereby secure one end of the support 18 and the forward endof said support is secured tothe tractor frame 11 by clamp or the like20 and, therefore, the upright supports 18 are rigidly secured to thesupports 21 to rigidly position the said supports 18 on the tractor onopposite sides thereof. If desired, the clamp 19 may have the portion19a formed as a clamp only or the counterweight 19h may be securedthereto as desired.

The depending supports 22 are secured on opposite sides of the tractorand are provided with the two or rnore pivot points. 23 and 24.

The supports 18 are each provided with the pivot connections 25 adjacentthe upper ends thereof.

When the apparatus is adapted for use as a loader, as shownin Fig. l,the push arms 26 are `each pivotally connected to one of the pivotconnections 25, as shown in Fig. 1, and the bucket 27 is pivotallyconnected to push arms 26 adjacent the forward or free yends thereof.The push arms 26 are provided with the pivot supports 28 and 29 onopposite sides thereof, with the extension 29 being positioned forwardlyof the extension 28 and having the double acting cylinder 30 pivotallyconnected thereto with the ram 31 pivotally connected to bucket 27 at32, whereby the cylinder 30 and ram 31 serve to pivot the earth handlingimplement in this case bucket 27 about its pivotal connection to thepush arms 26.

The pivot connection 28 which is positioned on the opposite side of pusharm 26 from pivot connection 29, is pivotally connected to the ram 33which extends into double acting cylinder 34, which in this instance ispivotally connected to the pivot connection 23.

The cylinders 34 and 30 are each connected` to the hydraulic systemthrough the sets of lines 35 and 36 respectively, and which are adaptedto be controlled by the -operating lever 37 for the control valve 38.Hydraulic power for operating the hydraulic system is furnished throughthe hydraulic pump 39 which is connected to control valve 38 in theusual manner.

When it is desired to convert the apparatus tot a dozer, the bucket 27is removed and the push arms 26 disconnected from pivot 25 vandcylinders 34 disconnected from pivots 23 and the position of push arms26 reversed, that is, they are turned up side down andthe ends ofcylinders 34 which were formerly connected to pivots 23 are pivotallyconnected to pivots 25 on support 18 and push arms 26 are pivotallyconnected to pivots 24 von support 22. Bucket 27 is replaced by theearth handling implement in this case dozer blade 40 which is pivotallyconnected at 41 to the forward ends of the push arms 26 and theconnecting link 42 which is pivotally connected at 43 to dozer blade 40are then pivotally connected to the pivots 29. Y

It will be seen from the above that by merely removing the dozer blade4t) or bucket 27 and reversing the position of the push arms and theconnection of the cylinders 34 that the device can be readily and easilyconverted for use either as a loader or dozer.

It will also be seen that by Arrreans of the supports 18, as previouslydescribed, the apparatus may be secured to a tractor without welding andto provide a streamlined, less expensive, more rugged construction.

lt will be noted that Athe cylinders 34 are positioned behind thesupports 18 and, therefore, the supports act as a guard for thecylinders 34.

In forming each of the push arms 26 a pair of oppositely disposedchannel or U-,shaped members 44 and 45 are positioned, as shown in Fig.5, with their internal edges or lips 46 and 47 in adjacent relation, andthen by welding as at 48 and 49 the members 44 and 45 are rigidlysecured together to form a relatively lightweight, rugged and economicalpush arm construction.

In the push arrn construction shown in Fig. 6, the meml bers 44 and 45are formed without the inturned lips 46 and 47 but have the bar or plate49 positioned therebetween with the plate or bar 49 being of slightlyless width than the sections 44 and 45 whereupon by welding in thespaces Si), the channel members 44 and 45 may be rigidly securedtogether to form a relatively less expensive, more rugged push armconstruction.

ln the form of the apparatus shown in Fig. 7, the loader construction issimilar to that of Fig. 1 except that the pivot connections on loaderpush arms 26 for bucket operating cylinders 30 is at 30a directly on thepush arms whereby the loader push arms may be removed and inverted andpivotally connected to pivot connection for adaption as dozer arms andcylinder 30 and ram 31 pivoted to the opposite side of push arms 26 andconnected at 32a to dozer blade 40 whereby the same cylinders and ramsmay be utilized to actuate bucket 27 and dozer blade 40.

An important feature of the present invention is that it allows theutilization of the apparatus either as a loader or tractor without thedisconnection of the hoses for the push arm operating cylinders.

From the foregoing it will be seen that I have provided simple, eicient,and economical means for obtaining all of the objects and advantages ofthe invention.

I claim:

l. In a tractor mounted apparatus, a pair of push arms carried by thetractor, hydraulic means pivotally connected to said push arms forraising and lowering said push arms, supports on the yopposite sides ofsaid tractor and extending upwardly from the tractor frame and havingpivotal connections adjacent their upper ends, supporting bracketsdepending from the tractor frame on the opposite sides of the tractorand having pivotal connections, said push arms having pivotalconnections adjacent the inner ends thereof for alternate .connection tosaid pivotal connections on said upwardly extending supports andsupporting brackets and second pivotal connections for one end of saidhydraulic means, said hydraulic means being connected at their other endto said supports adjacent the upper ends thereof when said push arms areconnected to said supporting brackets and said hydraulic means beingconnected also at their other end to said supporting brackets upon areversal of said push arms, when said push arms are to be connected tosaid supports adjacent their upper ends, whereby said push arms may beused for supporting a dozer blade when connected to said supportingbrackets or a loader bucket when connected to said supports vadjacenttheir upper ends, while utilizing the same hydraulic means and withoutdetaching the hydraulic means therefrom.

2. In a tractor'mounted apparatus, a pair of push arms carried by thetractor, hydraulic means pivotally connected to said push arms -foryraising and lowering said push arms, supports on the opposite sides ofsaid tractor .4 and extending upwardly from the tractor frame and havingpivotal connections adjacent their upper ends, sup porting bracketsdepending from the tractor frame on the opposite sides of the tractorand having pivotal connections, said push arms having pivotalconnections adjacent the inner ends thereof for alternate connection tosaid pivotal connections on said upwardly extending supports and saidsupporting brackets and second pivotal connections for one end of saidhydraulic means, said hydraulic means being connected at their other endto said supports adjacent the upper ends thereof when said push arms areconnected to said supporting brackets and said hydraulic means beingconnected also at their other end to said supporting brackets upon areversal of said push arms, when said push arms are to be connected tosaid supports adjacent their upper ends, whereby said push arms may beused for supporting a dozer blade when connected to said supportingbrackets or a loader bucket when connected to said supports .adjacenttheir upper ends, while utilizing thesame hydraulic means and withoutdetaching the hydraulic means therefrom, said supports having clampmeans for connection to the dead axle of the tractor.

3. in a tractor mounted apparatus, a pair of push arms carried by thetractor, hydraulic means pivotally connected to said push arms forraising and lowering said push arms, supports on the opposite sides ofsaid tractor and extending upwardly from the tractor frame and havingpivotal connections adjacent their upper ends, supporting bracketsdepending from the tractor frame on the opposite sides of the tractorand having pivotal connections, said push arms having pivotalconnections adjacent the inner ends thereof for alternate connection tosaid pivotal connections on said upwardly extending supports andsupporting brackets and second pivotal connections for one end of saidhydraulic means, said hydraulic means being connected at their other endto said supports adjacent the upper ends thereof when said push arms areconnected to said supporting brackets and said hydraulic means beingconnected also at their other end to said supporting brackets upon areversal of said push arms, when said push arms are to be connected tosaid supports adjacent their upper ends, whereby said push arms may beused for'supporting a dozer blade when connected to said supportingbrackets .or a loader bucket when connected to said supports adjacenttheir upper ends, while utilizing the same hydraulic means and withoutdetaching the hydraulic means therefrom, said supports beingsubstantially triangular in shape and having clamp means adjacent therear corner thereof for connection to the dead axle of the tractor.

4. A tractor mounted convertible earth handling device comprising a pairof supports, one of said supports being secured on each side of thetractor and extending upwardly therefrom, each of said supports havingmeans for connecting said support to the tractor frame and having apivotal connection adjacent its upper end, a supporting bracketdepending from the tractor frame below each of said supports, a pivotalconnection on each said bracket, a push arm adapted to be selectivelypivotally connected to each of said supports or to each of saiddepending brackets, and a pair of hydraulic piston and cylinder meanseach adapted to be pivotally connected at one end to one of said pusharms and at the other end to said pivotal connection on an adjacentsupport when said push arms are mounted on said brackets in position foruse with a bulldozer blade, said push arms and said hydraulic piston andcylinder means being adapted to be demounted as a unit and remounted onsaid support and on said bracket respectively'to -place said push armsin position for use with a loader.

5. The device of claim 4 in which each said push arm is provided at itsforward end with a forward mounting for a bulldozer blade or loader, ahydraulic cylinder and piston means mounted on each of said push armsadjacent said forward mounting, said hydraulic cylinder and piston meansbeing also provided with a forward mounting for connection to thebulldozer blade or loader.

6. An attachment for a tractor for selective use as a bulldozer or aloader, comprising a pair of supports tixedly mounted one on each sideof a tractor frame, and extending upwardly therefrom, a pivotalconnection adjacent the upper end of each said support, a pair ofdownwardly extending portions associated with said supports, each saidportion being provided with at least one pivotal mounting, a pair ofpush arms one for each side of said tractor, each said arm beingselectively mountable on the pivotal connection or the pivotal mountingof a support and a portion, respectively, on one side of the tractor toextend forwardly thereon, a hydraulic piston and cylinder devicepivotally connected to each said push arm forwardly of its mounting andarranged for selective connection with said pivotal connection or saidpivotal mounting respectively, whereby said push arms may be usedselectively to actuate a bulldozer blade or a loading bucket mounted onthe forward ends thereof upon disconnecting said push arms from theirmounting on said supports and reconnecting the push arms in invertedposition to said portions with a corresponding disconnection of thehydraulic cylinder assemblies to said portions and a reconnection tosaid supports, respectively.

7. The device of claim 6 in which said downwardly extending portions areeach provided with two pivotal mountings, the lower said mounting ofeach being used to mount the p-ush arms for bulldozing use and the uppersaid mounting of each being used to mount the hydraulic piston andcylinder devices for loading use.

References Cited in the ile of this patent UNITED STATES PATENTS2,048,561 Neveling July 21, 1936 2,198,147 Austin Apr. 23, 19402,339,518 Reisser Jan. 18, 1944 2,377,495 Hofmeister June 5, 19452,420,027 Austin May 6, 1947 2,449,279 Conklin Sept. 14, 1948 2,494,225Blake Jan. 10, 1950 2,517,582 Lull Aug. 8, 1950 2,519,974 Mork Aug. 22,1950 2,610,754 Inskeep Sept. 16, 1952 2,626,470 Cook et al. Jan. 27,1953

